Обновите Ubuntu to python 3.85
sudo apt-get install python3.8
Gifted Guanaco
sudo apt-get install python3.8
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 1
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 2
sudo update-alternatives --config python3
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
python3 -V
apt list | grep python3.8